Ok please forgive my ignorance. Pretty new to the mustang world. But what is the difference between 2005-09 vs 2010. I have found alot of different parts that say they will fit 05-09 on one site and the same exact part on another site saying it will fit 2010. SO what is the major difference? BTW I have used the search function on this site as well as google ect and havent been able to come up with an explination.